1 /* 2 * Copyright (C) 2008 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef SMILTime_h 27 #define SMILTime_h 28 29 #include "wtf/Assertions.h" 30 #include "wtf/MathExtras.h" 31 32 namespace WebCore { 33 34 class SMILTime { 35 public: SMILTime()36 SMILTime() : m_time(0) { } SMILTime(double time)37 SMILTime(double time) : m_time(time) { ASSERT(!std::isnan(time)); } SMILTime(const SMILTime & o)38 SMILTime(const SMILTime& o) : m_time(o.m_time) { } 39 unresolved()40 static SMILTime unresolved() { return unresolvedValue; } indefinite()41 static SMILTime indefinite() { return indefiniteValue; } 42 43 SMILTime& operator=(const SMILTime& o) { m_time = o.m_time; return *this; } value()44 double value() const { return m_time; } 45 isFinite()46 bool isFinite() const { return m_time < indefiniteValue; } isIndefinite()47 bool isIndefinite() const { return m_time == indefiniteValue; } isUnresolved()48 bool isUnresolved() const { return m_time == unresolvedValue; } 49 50 private: 51 static const double unresolvedValue; 52 static const double indefiniteValue; 53 54 double m_time; 55 }; 56 57 class SMILTimeWithOrigin { 58 public: 59 enum Origin { 60 ParserOrigin, 61 ScriptOrigin 62 }; 63 SMILTimeWithOrigin()64 SMILTimeWithOrigin() 65 : m_origin(ParserOrigin) 66 { 67 } 68 SMILTimeWithOrigin(const SMILTime & time,Origin origin)69 SMILTimeWithOrigin(const SMILTime& time, Origin origin) 70 : m_time(time) 71 , m_origin(origin) 72 { 73 } 74 time()75 const SMILTime& time() const { return m_time; } originIsScript()76 bool originIsScript() const { return m_origin == ScriptOrigin; } 77 78 private: 79 SMILTime m_time; 80 Origin m_origin; 81 }; 82 83 struct SMILInterval { SMILIntervalSMILInterval84 SMILInterval() { } SMILIntervalSMILInterval85 SMILInterval(const SMILTime& begin, const SMILTime& end) : begin(begin), end(end) { } 86 87 SMILTime begin; 88 SMILTime end; 89 }; 90 91 inline bool operator==(const SMILTime& a, const SMILTime& b) { return a.isFinite() && a.value() == b.value(); } 92 inline bool operator!(const SMILTime& a) { return !a.isFinite() || !a.value(); } 93 inline bool operator!=(const SMILTime& a, const SMILTime& b) { return !operator==(a, b); } 94 inline bool operator>(const SMILTime& a, const SMILTime& b) { return a.value() > b.value(); } 95 inline bool operator<(const SMILTime& a, const SMILTime& b) { return a.value() < b.value(); } 96 inline bool operator>=(const SMILTime& a, const SMILTime& b) { return a.value() > b.value() || operator==(a, b); } 97 inline bool operator<=(const SMILTime& a, const SMILTime& b) { return a.value() < b.value() || operator==(a, b); } 98 inline bool operator<(const SMILTimeWithOrigin& a, const SMILTimeWithOrigin& b) { return a.time() < b.time(); } 99 100 SMILTime operator+(const SMILTime&, const SMILTime&); 101 SMILTime operator-(const SMILTime&, const SMILTime&); 102 // So multiplying times does not make too much sense but SMIL defines it for duration * repeatCount 103 SMILTime operator*(const SMILTime&, const SMILTime&); 104 105 inline bool operator!=(const SMILInterval& a, const SMILInterval& b) 106 { 107 // Compare the "raw" values since the operator!= for SMILTime always return 108 // true for non-finite times. 109 return a.begin.value() != b.begin.value() || a.end.value() != b.end.value(); 110 } 111 112 } 113 114 #endif // SMILTime_h 115